The chief of presidential security under former Haitian President Jean-Bertrand Aristide was shot to death Monday in the capital, where he had lived since returning to the country after finishing a prison sentence in the United States.

Backed by allied Shiite, Sunni and Iranian fighters, Iraqi security forces launched a large-scale military operation Monday to recapture Saddam Hussein's hometown from the Islamic State (IS) extremist group, a major step in a campaign to reclaim territory in northern Iraq controlled by the militants.

U.S. Secretary of State John Kerry is warning that public discussion of details of the ongoing nuclear negotiations with Iran will make it more difficult to reach a deal that prevents the country from developing atomic weapons.

Tens of thousands of people marched in central Moscow on Sunday to honor the memory of opposition leader Boris Nemtsov, who was gunned down near the Kremlin in the highest-profile assassination of Vladimir Putin's rule.